I had a pretty decent laptop from Dell a few years back. It's been in the possession of my mom until my sister and her teenage kids got ahold of it. The battery needed replacing recently. Other than that it has had few problems. Today I was presented with the laptop 30 minutes before I had to leave. I was told he kept freezing up. Also this large area of the screen had this big box over it. I would liken it to the box created when you want to group select things by holding down the mouse button and dragging it. Oddly, this box was still present during the booting process and in safe mode. It was not there on an external monitor. My first guess is probably correct, the screen is damaged.
I spent what little time I had trying to fix the other problem. There were 6 antivirus programs on it. 1 I never heard of. It appears to be the cause of the freezing. I uninstalled 3 of the antivirus programs, along with other bloatware. Uninstalling the one was odd. It deleted A LOT of files from a cashe folder. When it froze there was a message stating it was waiting on the cashe. The uninstall fixed the freezing problem. I'm going to take admin rights away from my family. Only I shall install software.
I'm afraid someone put something on the laptop. I suspect someone thought it would be a nice place to put a heavy book or something. My mom is bad about putting stuff on top of electronic equipment. She'll even put drink bottles and cups on them. I have seen more than one device with rings on the screen much like the ring found under a cup on a table. LAPTOPS AND TABLETS ARE NOT DRINK TRAYS OR TABLES!!!!!!!!! If it is on a table and you have nowhere to place your drink, move the fecking tablet or laptop, then put the drink on the table.
I used to be a big fan of P2P file sharing ( watched Battlestar Galactica episodes days before it was on syfy). I kept McAfee, Malware Bytes, and Superantispyware on my computers. Those programs will remove nearly any bug. Superantispyware even helped me get that FBI scam screen removed from a computer. I had to run it from command line to do it. It's a great program and highly recommended it.